Jarod Wilson | 085ffd0 | 2010-07-26 20:28:37 -0300 | [diff] [blame^] | 1 | /* |
| 2 | * lirc_i2c.c |
| 3 | * |
| 4 | * i2c IR driver for the onboard IR port on many TV tuner cards, including: |
| 5 | * -Flavors of the Hauppauge PVR-150/250/350 |
| 6 | * -Hauppauge HVR-1300 |
| 7 | * -PixelView (BT878P+W/FM) |
| 8 | * -KNC ONE TV Station/Anubis Typhoon TView Tuner |
| 9 | * -Asus TV-Box and Creative/VisionTek BreakOut-Box |
| 10 | * -Leadtek Winfast PVR2000 |
| 11 | * |
| 12 | * Copyright (c) 2000 Gerd Knorr <kraxel@goldbach.in-berlin.de> |
| 13 | * modified for PixelView (BT878P+W/FM) by |
| 14 | * Michal Kochanowicz <mkochano@pld.org.pl> |
| 15 | * Christoph Bartelmus <lirc@bartelmus.de> |
| 16 | * modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by |
| 17 | * Ulrich Mueller <ulrich.mueller42@web.de> |
| 18 | * modified for Asus TV-Box and Creative/VisionTek BreakOut-Box by |
| 19 | * Stefan Jahn <stefan@lkcc.org> |
| 20 | * modified for inclusion into kernel sources by |
| 21 | * Jerome Brock <jbrock@users.sourceforge.net> |
| 22 | * modified for Leadtek Winfast PVR2000 by |
| 23 | * Thomas Reitmayr (treitmayr@yahoo.com) |
| 24 | * modified for Hauppauge HVR-1300 by |
| 25 | * Jan Frey (jfrey@gmx.de) |
| 26 | * |
| 27 | * parts are cut&pasted from the old lirc_haup.c driver |
| 28 | * |
| 29 | * This program is free software; you can redistribute it and/or modify |
| 30 | * it under the terms of the GNU General Public License as published by |
| 31 | * the Free Software Foundation; either version 2 of the License, or |
| 32 | * (at your option) any later version. |
| 33 | * |
| 34 | * This program is distributed in the hope that it will be useful, |
| 35 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 36 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 37 | * GNU General Public License for more details. |
| 38 | * |
| 39 | * You should have received a copy of the GNU General Public License |
| 40 | * along with this program; if not, write to the Free Software |
| 41 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 42 | */ |
| 43 | |
| 44 | |
| 45 | #include <linux/version.h> |
| 46 | #include <linux/module.h> |
| 47 | #include <linux/kmod.h> |
| 48 | #include <linux/kernel.h> |
| 49 | #include <linux/sched.h> |
| 50 | #include <linux/string.h> |
| 51 | #include <linux/timer.h> |
| 52 | #include <linux/delay.h> |
| 53 | #include <linux/errno.h> |
| 54 | #include <linux/slab.h> |
| 55 | #include <linux/i2c.h> |
| 56 | #include <linux/i2c-algo-bit.h> |
| 57 | |
| 58 | #include <media/lirc_dev.h> |
| 59 | |
| 60 | struct IR { |
| 61 | struct lirc_driver l; |
| 62 | struct i2c_client c; |
| 63 | int nextkey; |
| 64 | unsigned char b[3]; |
| 65 | unsigned char bits; |
| 66 | unsigned char flag; |
| 67 | }; |
| 68 | |
| 69 | #define DEVICE_NAME "lirc_i2c" |
| 70 | |
| 71 | /* module parameters */ |
| 72 | static int debug; /* debug output */ |
| 73 | static int minor = -1; /* minor number */ |
| 74 | |
| 75 | #define dprintk(fmt, args...) \ |
| 76 | do { \ |
| 77 | if (debug) \ |
| 78 | printk(KERN_DEBUG DEVICE_NAME ": " fmt, \ |
| 79 | ## args); \ |
| 80 | } while (0) |
| 81 | |
| 82 | static int reverse(int data, int bits) |
| 83 | { |
| 84 | int i; |
| 85 | int c; |
| 86 | |
| 87 | for (c = 0, i = 0; i < bits; i++) |
| 88 | c |= ((data & (1<<i)) ? 1 : 0) << (bits-1-i); |
| 89 | |
| 90 | return c; |
| 91 | } |
| 92 | |
| 93 | static int add_to_buf_adap(void *data, struct lirc_buffer *buf) |
| 94 | { |
| 95 | struct IR *ir = data; |
| 96 | unsigned char keybuf[4]; |
| 97 | |
| 98 | keybuf[0] = 0x00; |
| 99 | i2c_master_send(&ir->c, keybuf, 1); |
| 100 | /* poll IR chip */ |
| 101 | if (i2c_master_recv(&ir->c, keybuf, sizeof(keybuf)) != sizeof(keybuf)) { |
| 102 | dprintk("read error\n"); |
| 103 | return -EIO; |
| 104 | } |
| 105 | |
| 106 | dprintk("key (0x%02x%02x%02x%02x)\n", |
| 107 | keybuf[0], keybuf[1], keybuf[2], keybuf[3]); |
| 108 | |
| 109 | /* key pressed ? */ |
| 110 | if (keybuf[2] == 0xff) |
| 111 | return -ENODATA; |
| 112 | |
| 113 | /* remove repeat bit */ |
| 114 | keybuf[2] &= 0x7f; |
| 115 | keybuf[3] |= 0x80; |
| 116 | |
| 117 | lirc_buffer_write(buf, keybuf); |
| 118 | return 0; |
| 119 | } |
| 120 | |
| 121 | static int add_to_buf_pcf8574(void *data, struct lirc_buffer *buf) |
| 122 | { |
| 123 | struct IR *ir = data; |
| 124 | int rc; |
| 125 | unsigned char all, mask; |
| 126 | unsigned char key; |
| 127 | |
| 128 | /* compute all valid bits (key code + pressed/release flag) */ |
| 129 | all = ir->bits | ir->flag; |
| 130 | |
| 131 | /* save IR writable mask bits */ |
| 132 | mask = i2c_smbus_read_byte(&ir->c) & ~all; |
| 133 | |
| 134 | /* send bit mask */ |
| 135 | rc = i2c_smbus_write_byte(&ir->c, (0xff & all) | mask); |
| 136 | |
| 137 | /* receive scan code */ |
| 138 | rc = i2c_smbus_read_byte(&ir->c); |
| 139 | |
| 140 | if (rc == -1) { |
| 141 | dprintk("%s read error\n", ir->c.name); |
| 142 | return -EIO; |
| 143 | } |
| 144 | |
| 145 | /* drop duplicate polls */ |
| 146 | if (ir->b[0] == (rc & all)) |
| 147 | return -ENODATA; |
| 148 | |
| 149 | ir->b[0] = rc & all; |
| 150 | |
| 151 | dprintk("%s key 0x%02X %s\n", ir->c.name, rc & ir->bits, |
| 152 | (rc & ir->flag) ? "released" : "pressed"); |
| 153 | |
| 154 | /* ignore released buttons */ |
| 155 | if (rc & ir->flag) |
| 156 | return -ENODATA; |
| 157 | |
| 158 | /* set valid key code */ |
| 159 | key = rc & ir->bits; |
| 160 | lirc_buffer_write(buf, &key); |
| 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | /* common for Hauppauge IR receivers */ |
| 165 | static int add_to_buf_haup_common(void *data, struct lirc_buffer *buf, |
| 166 | unsigned char *keybuf, int size, int offset) |
| 167 | { |
| 168 | struct IR *ir = data; |
| 169 | __u16 code; |
| 170 | unsigned char codes[2]; |
| 171 | int ret; |
| 172 | |
| 173 | /* poll IR chip */ |
| 174 | ret = i2c_master_recv(&ir->c, keybuf, size); |
| 175 | if (ret == size) { |
| 176 | ir->b[0] = keybuf[offset]; |
| 177 | ir->b[1] = keybuf[offset+1]; |
| 178 | ir->b[2] = keybuf[offset+2]; |
| 179 | if (ir->b[0] != 0x00 && ir->b[1] != 0x00) |
| 180 | dprintk("key (0x%02x/0x%02x)\n", ir->b[0], ir->b[1]); |
| 181 | } else { |
| 182 | dprintk("read error (ret=%d)\n", ret); |
| 183 | /* keep last successful read buffer */ |
| 184 | } |
| 185 | |
| 186 | /* key pressed ? */ |
| 187 | if ((ir->b[0] & 0x80) == 0) |
| 188 | return -ENODATA; |
| 189 | |
| 190 | /* look what we have */ |
| 191 | code = (((__u16)ir->b[0]&0x7f)<<6) | (ir->b[1]>>2); |
| 192 | |
| 193 | codes[0] = (code >> 8) & 0xff; |
| 194 | codes[1] = code & 0xff; |
| 195 | |
| 196 | /* return it */ |
| 197 | dprintk("sending code 0x%02x%02x to lirc\n", codes[0], codes[1]); |
| 198 | lirc_buffer_write(buf, codes); |
| 199 | return 0; |
| 200 | } |
| 201 | |
| 202 | /* specific for the Hauppauge PVR150 IR receiver */ |
| 203 | static int add_to_buf_haup_pvr150(void *data, struct lirc_buffer *buf) |
| 204 | { |
| 205 | unsigned char keybuf[6]; |
| 206 | /* fetch 6 bytes, first relevant is at offset 3 */ |
| 207 | return add_to_buf_haup_common(data, buf, keybuf, 6, 3); |
| 208 | } |
| 209 | |
| 210 | /* used for all Hauppauge IR receivers but the PVR150 */ |
| 211 | static int add_to_buf_haup(void *data, struct lirc_buffer *buf) |
| 212 | { |
| 213 | unsigned char keybuf[3]; |
| 214 | /* fetch 3 bytes, first relevant is at offset 0 */ |
| 215 | return add_to_buf_haup_common(data, buf, keybuf, 3, 0); |
| 216 | } |
| 217 | |
| 218 | |
| 219 | static int add_to_buf_pvr2000(void *data, struct lirc_buffer *buf) |
| 220 | { |
| 221 | struct IR *ir = data; |
| 222 | unsigned char key; |
| 223 | s32 flags; |
| 224 | s32 code; |
| 225 | |
| 226 | /* poll IR chip */ |
| 227 | flags = i2c_smbus_read_byte_data(&ir->c, 0x10); |
| 228 | if (-1 == flags) { |
| 229 | dprintk("read error\n"); |
| 230 | return -ENODATA; |
| 231 | } |
| 232 | /* key pressed ? */ |
| 233 | if (0 == (flags & 0x80)) |
| 234 | return -ENODATA; |
| 235 | |
| 236 | /* read actual key code */ |
| 237 | code = i2c_smbus_read_byte_data(&ir->c, 0x00); |
| 238 | if (-1 == code) { |
| 239 | dprintk("read error\n"); |
| 240 | return -ENODATA; |
| 241 | } |
| 242 | |
| 243 | key = code & 0xFF; |
| 244 | |
| 245 | dprintk("IR Key/Flags: (0x%02x/0x%02x)\n", key, flags & 0xFF); |
| 246 | |
| 247 | /* return it */ |
| 248 | lirc_buffer_write(buf, &key); |
| 249 | return 0; |
| 250 | } |
| 251 | |
| 252 | static int add_to_buf_pixelview(void *data, struct lirc_buffer *buf) |
| 253 | { |
| 254 | struct IR *ir = data; |
| 255 | unsigned char key; |
| 256 | |
| 257 | /* poll IR chip */ |
| 258 | if (1 != i2c_master_recv(&ir->c, &key, 1)) { |
| 259 | dprintk("read error\n"); |
| 260 | return -1; |
| 261 | } |
| 262 | dprintk("key %02x\n", key); |
| 263 | |
| 264 | /* return it */ |
| 265 | lirc_buffer_write(buf, &key); |
| 266 | return 0; |
| 267 | } |
| 268 | |
| 269 | static int add_to_buf_pv951(void *data, struct lirc_buffer *buf) |
| 270 | { |
| 271 | struct IR *ir = data; |
| 272 | unsigned char key; |
| 273 | unsigned char codes[4]; |
| 274 | |
| 275 | /* poll IR chip */ |
| 276 | if (1 != i2c_master_recv(&ir->c, &key, 1)) { |
| 277 | dprintk("read error\n"); |
| 278 | return -ENODATA; |
| 279 | } |
| 280 | /* ignore 0xaa */ |
| 281 | if (key == 0xaa) |
| 282 | return -ENODATA; |
| 283 | dprintk("key %02x\n", key); |
| 284 | |
| 285 | codes[0] = 0x61; |
| 286 | codes[1] = 0xD6; |
| 287 | codes[2] = reverse(key, 8); |
| 288 | codes[3] = (~codes[2])&0xff; |
| 289 | |
| 290 | lirc_buffer_write(buf, codes); |
| 291 | return 0; |
| 292 | } |
| 293 | |
| 294 | static int add_to_buf_knc1(void *data, struct lirc_buffer *buf) |
| 295 | { |
| 296 | static unsigned char last_key = 0xFF; |
| 297 | struct IR *ir = data; |
| 298 | unsigned char key; |
| 299 | |
| 300 | /* poll IR chip */ |
| 301 | if (1 != i2c_master_recv(&ir->c, &key, 1)) { |
| 302 | dprintk("read error\n"); |
| 303 | return -ENODATA; |
| 304 | } |
| 305 | |
| 306 | /* |
| 307 | * it seems that 0xFE indicates that a button is still held |
| 308 | * down, while 0xFF indicates that no button is held |
| 309 | * down. 0xFE sequences are sometimes interrupted by 0xFF |
| 310 | */ |
| 311 | |
| 312 | dprintk("key %02x\n", key); |
| 313 | |
| 314 | if (key == 0xFF) |
| 315 | return -ENODATA; |
| 316 | |
| 317 | if (key == 0xFE) |
| 318 | key = last_key; |
| 319 | |
| 320 | last_key = key; |
| 321 | lirc_buffer_write(buf, &key); |
| 322 | |
| 323 | return 0; |
| 324 | } |
| 325 | |
| 326 | static int set_use_inc(void *data) |
| 327 | { |
| 328 | struct IR *ir = data; |
| 329 | |
| 330 | dprintk("%s called\n", __func__); |
| 331 | |
| 332 | /* lock bttv in memory while /dev/lirc is in use */ |
| 333 | i2c_use_client(&ir->c); |
| 334 | |
| 335 | return 0; |
| 336 | } |
| 337 | |
| 338 | static void set_use_dec(void *data) |
| 339 | { |
| 340 | struct IR *ir = data; |
| 341 | |
| 342 | dprintk("%s called\n", __func__); |
| 343 | |
| 344 | i2c_release_client(&ir->c); |
| 345 | } |
| 346 | |
| 347 | static struct lirc_driver lirc_template = { |
| 348 | .name = "lirc_i2c", |
| 349 | .set_use_inc = set_use_inc, |
| 350 | .set_use_dec = set_use_dec, |
| 351 | .dev = NULL, |
| 352 | .owner = THIS_MODULE, |
| 353 | }; |
| 354 | |
| 355 | static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id); |
| 356 | static int ir_remove(struct i2c_client *client); |
| 357 | static int ir_command(struct i2c_client *client, unsigned int cmd, void *arg); |
| 358 | |
| 359 | static const struct i2c_device_id ir_receiver_id[] = { |
| 360 | /* Generic entry for any IR receiver */ |
| 361 | { "ir_video", 0 }, |
| 362 | /* IR device specific entries could be added here */ |
| 363 | { } |
| 364 | }; |
| 365 | |
| 366 | static struct i2c_driver driver = { |
| 367 | .driver = { |
| 368 | .owner = THIS_MODULE, |
| 369 | .name = "i2c ir driver", |
| 370 | }, |
| 371 | .probe = ir_probe, |
| 372 | .remove = ir_remove, |
| 373 | .id_table = ir_receiver_id, |
| 374 | .command = ir_command, |
| 375 | }; |
| 376 | |
| 377 | static void pcf_probe(struct i2c_client *client, struct IR *ir) |
| 378 | { |
| 379 | int ret1, ret2, ret3, ret4; |
| 380 | |
| 381 | ret1 = i2c_smbus_write_byte(client, 0xff); |
| 382 | ret2 = i2c_smbus_read_byte(client); |
| 383 | ret3 = i2c_smbus_write_byte(client, 0x00); |
| 384 | ret4 = i2c_smbus_read_byte(client); |
| 385 | |
| 386 | /* in the Asus TV-Box: bit 1-0 */ |
| 387 | if (((ret2 & 0x03) == 0x03) && ((ret4 & 0x03) == 0x00)) { |
| 388 | ir->bits = (unsigned char) ~0x07; |
| 389 | ir->flag = 0x04; |
| 390 | /* in the Creative/VisionTek BreakOut-Box: bit 7-6 */ |
| 391 | } else if (((ret2 & 0xc0) == 0xc0) && ((ret4 & 0xc0) == 0x00)) { |
| 392 | ir->bits = (unsigned char) ~0xe0; |
| 393 | ir->flag = 0x20; |
| 394 | } |
| 395 | |
| 396 | return; |
| 397 | } |
| 398 | |
| 399 | static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id) |
| 400 | { |
| 401 | struct IR *ir; |
| 402 | struct i2c_adapter *adap = client->adapter; |
| 403 | unsigned short addr = client->addr; |
| 404 | int retval; |
| 405 | |
| 406 | ir = kzalloc(sizeof(struct IR), GFP_KERNEL); |
| 407 | if (!ir) |
| 408 | return -ENOMEM; |
| 409 | memcpy(&ir->l, &lirc_template, sizeof(struct lirc_driver)); |
| 410 | memcpy(&ir->c, client, sizeof(struct i2c_client)); |
| 411 | |
| 412 | i2c_set_clientdata(client, ir); |
| 413 | ir->l.data = ir; |
| 414 | ir->l.minor = minor; |
| 415 | ir->l.sample_rate = 10; |
| 416 | ir->l.dev = &ir->c.dev; |
| 417 | ir->nextkey = -1; |
| 418 | |
| 419 | switch (addr) { |
| 420 | case 0x64: |
| 421 | strlcpy(ir->c.name, "Pixelview IR", I2C_NAME_SIZE); |
| 422 | ir->l.code_length = 8; |
| 423 | ir->l.add_to_buf = add_to_buf_pixelview; |
| 424 | break; |
| 425 | case 0x4b: |
| 426 | strlcpy(ir->c.name, "PV951 IR", I2C_NAME_SIZE); |
| 427 | ir->l.code_length = 32; |
| 428 | ir->l.add_to_buf = add_to_buf_pv951; |
| 429 | break; |
| 430 | case 0x71: |
| 431 | if (adap->id == I2C_HW_B_CX2388x) |
| 432 | strlcpy(ir->c.name, "Hauppauge HVR1300", I2C_NAME_SIZE); |
| 433 | else /* bt8xx or cx2341x */ |
| 434 | /* |
| 435 | * The PVR150 IR receiver uses the same protocol as |
| 436 | * other Hauppauge cards, but the data flow is |
| 437 | * different, so we need to deal with it by its own. |
| 438 | */ |
| 439 | strlcpy(ir->c.name, "Hauppauge PVR150", I2C_NAME_SIZE); |
| 440 | ir->l.code_length = 13; |
| 441 | ir->l.add_to_buf = add_to_buf_haup_pvr150; |
| 442 | break; |
| 443 | case 0x6b: |
| 444 | strlcpy(ir->c.name, "Adaptec IR", I2C_NAME_SIZE); |
| 445 | ir->l.code_length = 32; |
| 446 | ir->l.add_to_buf = add_to_buf_adap; |
| 447 | break; |
| 448 | case 0x18: |
| 449 | case 0x1a: |
| 450 | if (adap->id == I2C_HW_B_CX2388x) { |
| 451 | strlcpy(ir->c.name, "Leadtek IR", I2C_NAME_SIZE); |
| 452 | ir->l.code_length = 8; |
| 453 | ir->l.add_to_buf = add_to_buf_pvr2000; |
| 454 | } else { /* bt8xx or cx2341x */ |
| 455 | strlcpy(ir->c.name, "Hauppauge IR", I2C_NAME_SIZE); |
| 456 | ir->l.code_length = 13; |
| 457 | ir->l.add_to_buf = add_to_buf_haup; |
| 458 | } |
| 459 | break; |
| 460 | case 0x30: |
| 461 | strlcpy(ir->c.name, "KNC ONE IR", I2C_NAME_SIZE); |
| 462 | ir->l.code_length = 8; |
| 463 | ir->l.add_to_buf = add_to_buf_knc1; |
| 464 | break; |
| 465 | case 0x21: |
| 466 | case 0x23: |
| 467 | pcf_probe(client, ir); |
| 468 | strlcpy(ir->c.name, "TV-Box IR", I2C_NAME_SIZE); |
| 469 | ir->l.code_length = 8; |
| 470 | ir->l.add_to_buf = add_to_buf_pcf8574; |
| 471 | break; |
| 472 | default: |
| 473 | /* shouldn't happen */ |
| 474 | printk("lirc_i2c: Huh? unknown i2c address (0x%02x)?\n", addr); |
| 475 | kfree(ir); |
| 476 | return -EINVAL; |
| 477 | } |
| 478 | printk(KERN_INFO "lirc_i2c: chip 0x%x found @ 0x%02x (%s)\n", |
| 479 | adap->id, addr, ir->c.name); |
| 480 | |
| 481 | retval = lirc_register_driver(&ir->l); |
| 482 | |
| 483 | if (retval < 0) { |
| 484 | printk(KERN_ERR "lirc_i2c: failed to register driver!\n"); |
| 485 | kfree(ir); |
| 486 | return retval; |
| 487 | } |
| 488 | |
| 489 | ir->l.minor = retval; |
| 490 | |
| 491 | return 0; |
| 492 | } |
| 493 | |
| 494 | static int ir_remove(struct i2c_client *client) |
| 495 | { |
| 496 | struct IR *ir = i2c_get_clientdata(client); |
| 497 | |
| 498 | /* unregister device */ |
| 499 | lirc_unregister_driver(ir->l.minor); |
| 500 | |
| 501 | /* free memory */ |
| 502 | kfree(ir); |
| 503 | return 0; |
| 504 | } |
| 505 | |
| 506 | static int ir_command(struct i2c_client *client, unsigned int cmd, void *arg) |
| 507 | { |
| 508 | /* nothing */ |
| 509 | return 0; |
| 510 | } |
| 511 | |
| 512 | static int __init lirc_i2c_init(void) |
| 513 | { |
| 514 | i2c_add_driver(&driver); |
| 515 | return 0; |
| 516 | } |
| 517 | |
| 518 | static void __exit lirc_i2c_exit(void) |
| 519 | { |
| 520 | i2c_del_driver(&driver); |
| 521 | } |
| 522 | |
| 523 | MODULE_DESCRIPTION("Infrared receiver driver for Hauppauge and " |
| 524 | "Pixelview cards (i2c stack)"); |
| 525 | MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, " |
| 526 | "Ulrich Mueller, Stefan Jahn, Jerome Brock"); |
| 527 | MODULE_LICENSE("GPL"); |
| 528 | |
| 529 | module_param(minor, int, S_IRUGO); |
| 530 | MODULE_PARM_DESC(minor, "Preferred minor device number"); |
| 531 | |
| 532 | module_param(debug, bool, S_IRUGO | S_IWUSR); |
| 533 | MODULE_PARM_DESC(debug, "Enable debugging messages"); |
| 534 | |
| 535 | module_init(lirc_i2c_init); |
| 536 | module_exit(lirc_i2c_exit); |